A noun is the name of a person, place, thing, quality, concept or action. Pronouns are usually small words that can replace a noun. They are used to 'rename' a person, place, or a thing. Some sample pronouns are: he, she, it, they, we, and you.

Nouns
 Nouns
 Count and Non-Count Nouns
Links:
 Count/Non-Count Nouns (University of Victoria)
 How to Count Non-Count Nouns (University of Victoria)
Noun Exercises
 Identifying Subjects 1
 Identifying Subjects 2
 Identifying Subjects 3
 Count and Non-Count Nouns: Much/Many
 Count and Non-Count Nouns: Arriving at Gallaudet
Pronouns
 Pronouns